abider
n. C2 Proficiency abider
n. a person who follows a rule or a law. This word is very old and you will almost never see it in modern books.
n. a person who observes or adheres to a law, rule, or agreement. Archaic in modern usage; primarily found in historical legal or religious texts.
The abider of the law was rewarded.
In the old kingdom, every citizen was expected to be a strict abider of the royal decrees.
The historical records describe the abider of the treaty as a figure of quiet strength, maintaining peace through unwavering adherence to the agreed terms.
From abide + -er.